Combine the carrot, cucumber, spring onion and chilli in a bowl. Add 1tsp fish sauce, 2tsp rice wine vinegar and a pinch of caster sugar and stir until the sugar is dissolved.
Make a paste by mixing 2 tsp olive oil, ½ tsp turmeric, ½ tsp ground coriander and ½ tsp hot chilli powder with some seasoning and rub the paste into the meat. Cook the steak on a griddle pan for 2 minutes each side (or more if you prefer meat well done). Allow the steak to rest for 5 minutes, then thinly slice.
Spread 2 baguettes with mayonnaise and add some lettuce and a small handful of coriander. Stuff with the carrot mixture and the steak. Serve with a little chilli sauce.
For top tips on protecting you and your family when preparing raw meat and poultry, visit Food Safety in the Home and view the full Food safety at home video.